| The rapid growth in the construction of the power system requires techniques in transmission designs for higher voltage levels.Due to the characteristics of high capacity,minimal waste,and long transmission distance and regardless of the issue of sychronous operation of the power system,the transmission system is playing a vital role in among the overall long distance and high capacity transmission projects.Through researching domestic and overseas literatures,this report discusses the effect on zoology of electromagnetic field in the UHV DC transmission lines.Also,through academic analysis,calculation and comparison to the current measure result,it processes plenty of simulative examinations to propose ways for analyzing compositive electric field and ionic current's density by applying EPRI on the DC transmission lines former.And it analyses wireless interference by using CISPR formula,analyses audible noise by EPRI formula,and obtained the recommended controlled limit value for project building.On the base of analyze above,the measure and scheme can be found to reduce the effect of electromagnetic environment,combining with the general requirement of electromagnetic environment'effect,which ensures the width of corridors in UHV DC transmission lines.
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